We have an old saying from my days in the Coast Guard. 95% of all equipment failure is due to operator error. Make sure the staff is not doing something stupid before you waste your time.
Computer monitors are very sensitive to the voltage supplied. A loose or missing neutral will have disastrous effects on the flyback transformer and should be eliminated before you continue your search.
I also agree with the bonding and grounding statement posted earlier. Bonding and grounding are the most common violations electrically speaking. It a subject that is sometimes misunderstood even by experienced electricians. Thee are often discrepancies between utility company specs, city specs and the NEC.
